Card USB flash drive, also known as "card concept USB flash drive" and "business card concept USB flash drive", is made of ABS material, and has the same appearance as a standard bank card, with a length and width of 85*52MM and a thickness of 1.2-2 mm, as shown in the figure (1). As a result, the card USB flash drive has become an excellent advertising carrier and the first choice in the electronic gift industry. Ordinary USB flash drive can only be used as the company's LOGO in appearance. At that time, it was effective for a while, and then it lost its publicity effect. In addition to the company's LOGO, the concept gift network card USB flash drive can also be used on the USB flash drive chip for corporate advertising and product introduction. The general service life of USB flash drive is 5-6 years (8- 10 years is no problem), which means that enterprises have spent several years on advertising. In this way, through the promotion of beer among customers, it is more credible and authentic, which is helpful to increase the number of customers. It can be said that it is a one-time purchase and lifelong service.